DBG is a PHP debugger and profiler. It makes it much easier to discover the origins of problems and bugs in PHP scripts. It's equipped with the ability to backtrace errors. It shows local and global variables as well as parameters which have been passed to all nested function calls at any point of execution. Among other things, it allows you to execute scripts in a step-by-step manner, set breakpoints (including conditional ones), evaluate expressions, and watch variables. The profiler allows you to find bottlenecks in PHP code at the functions level as well as the modules level and even the source lines level.

ATG Dynamo integration for JBuilder is a JBuilder
5 plugin that makes it easy to deploy J2EE
applications to the ATG Dynamo Application Server
version 5.1 (DAS). It can be installed and run
with the other JBuilder 5 plugins such as BEA
WebLogicServer 5.1, BEA WLS 6, IBM WebSphere 3.5,
Borland AS 4.5, etc.

Java Memory Profiler (JMP) uses the JVMPI interface to track objects and method times in the JVM (Java Virtual Machine). It uses a GTK+ interface to display statistics. The current instance count and the total amount of memory for each class is shown as is the total time spent in each method.

CLIP is a Clipper/XBase compatible compiler with
initial support other xBase dialects. It features
support for international languages and character
sets. It also features OOP, a multiplatform GUI
based on GTK/GTKextra, all SIX/Comix features
(including hypertext indexing), SQL and ODBC
drivers, a C-API for third-party developers, a few
wrappers for popular libraries (such as BZIP,
GZIP, GD, Crypto, and Fcgi), a multitasking client
and application server based on TCP/IP sockets,
object data base utilities, and a functions library.

APD is a general purpose non-interactive PHP
profiler/debugger that produces formatted
strace/truss type reports. APD supports full stack
backtraces via calls similar to croak() in Perl's
carp. APD is a Zend Extension and is designed to
provide timing with the minimal performance
impact. APD supports varying levels of debugging
and can be turned on/off in individual scripts.

The dbg library is a set of C++ utilities to
facilitate modern debugging idioms. It
integrates well with standard library usage,
providing constraints and an integrated
stream-based logging facility. It is
customizable and flexible.

Tixapps is a suite of development applications that run with Tcl/Tk or Python,
using the Tix widget set. Applications currently included in Tixapps are
tixinspect (an inspector for Tix/Tk applications), tixdebug (a debugger to work
with tixinspect), and tixinfo (an info browser for GNU documentation).

DIOTA is a just-in-time instrumentation tool for Intel binaries. It allows you to create a dynamic loadable library that can be attached to a program running under Linux. DIOTA can instrument all memory operations in the application and the used libraries (e.g., for checking for faulty memory accesses), calls of dynamically linked procedures (malloc, printf, etc.), detect the code executed during a particular run, and more.

joeq is a Java 2 (JDK 1.3 and 1.4) compatible virtual machine. It is unique in that it is entirely implemented in Java, leading to greater reliability, portability, maintainability, and efficiency. It is also language-independent, so code from any supported language can be seamlessly compiled, linked, and executed dynamically.